What is a key aspect of establishing a suspect's involvement in a case during follow-up procedures?

Establishing the crime was committed is crucial in follow-up procedures to ascertain a suspect's involvement. This foundational element allows law enforcement to confirm that a criminal act occurred, which is essential in understanding the context of the investigation. Once it is established that a crime took place, investigators can analyze evidence, identify potential suspects, and establish the motive or opportunity involved.

Without confirming that a crime was committed, subsequent steps like evaluating alibi statements, interviewing witnesses, or collecting additional witness statements would lack a critical framework. Essentially, verifying the occurrence of the crime anchors the entire investigative process and provides clarity and direction for determining the roles of identified suspects.